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# frozen_string_literal: true
module Gitlab
module UsageDataCounters
module HLLRedisCounter
KEY_EXPIRY_LENGTH = 6.weeks
REDIS_SLOT = 'hll_counters'
EventError = Class.new(StandardError)
UnknownEvent = Class.new(EventError)
InvalidContext = Class.new(EventError)
KNOWN_EVENTS_PATH = File.expand_path('known_events/*.yml', __dir__)
# Track event on entity_id
# Increment a Redis HLL counter for unique event_name and entity_id
#
# All events should be added to known_events yml files lib/gitlab/usage_data_counters/known_events/
#
# Event example:
#
# - name: g_compliance_dashboard # Unique event name
#
# Usage:
#
# * Track event: Gitlab::UsageDataCounters::HLLRedisCounter.track_event('g_compliance_dashboard', values: user_id)
# * Get unique counts per user: Gitlab::UsageDataCounters::HLLRedisCounter.unique_events(event_names: 'g_compliance_dashboard', start_date: 28.days.ago, end_date: Date.current)
class << self
include Gitlab::Utils::UsageData
include Gitlab::Usage::TimeFrame
# Track unique events
#
# event_name - The event name.
# values - One or multiple values counted.
# time - Time of the action, set to Time.current.
def track_event(event_name, values:, time: Time.current)
track(values, event_name, time: time)
end
# Track unique events
#
# event_name - The event name.
# values - One or multiple values counted.
# context - Event context, plan level tracking.
# time - Time of the action, set to Time.current.
def track_event_in_context(event_name, values:, context:, time: Time.zone.now)
return if context.blank?
return unless context.in?(valid_context_list)
track(values, event_name, context: context, time: time)
end
# Count unique events for a given time range.
#
# event_names - The list of the events to count.
# start_date - The start date of the time range.
# end_date - The end date of the time range.
# context - Event context, plan level tracking. Available if set when tracking.
def unique_events(event_names:, start_date:, end_date:, context: '')
count_unique_events(event_names: event_names, start_date: start_date, end_date: end_date, context: context) do
raise InvalidContext if context.present? && !context.in?(valid_context_list)
end
end
def known_event?(event_name)
event_for(event_name).present?
end
def known_events
@known_events ||= load_events(KNOWN_EVENTS_PATH)
end
def calculate_events_union(event_names:, start_date:, end_date:)
count_unique_events(event_names: event_names, start_date: start_date, end_date: end_date)
end
private
def track(values, event_name, context: '', time: Time.zone.now)
return unless ::ServicePing::ServicePingSettings.enabled?
event = event_for(event_name)
Gitlab::ErrorTracking.track_and_raise_for_dev_exception(UnknownEvent.new("Unknown event #{event_name}")) unless event.present?
return if event.blank?
return unless Feature.enabled?(:redis_hll_tracking, type: :ops)
Gitlab::Redis::HLL.add(key: redis_key(event, time, context), value: values, expiry: KEY_EXPIRY_LENGTH)
rescue StandardError => e
# Ignore any exceptions unless is dev or test env
# The application flow should not be blocked by erros in tracking
Gitlab::ErrorTracking.track_and_raise_for_dev_exception(e)
end
# The array of valid context on which we allow tracking
def valid_context_list
Plan.all_plans
end
def count_unique_events(event_names:, start_date:, end_date:, context: '')
events = events_for(Array(event_names).map(&:to_s))
yield events if block_given?
keys = keys_for_aggregation(events: events, start_date: start_date, end_date: end_date, context: context)
return FALLBACK unless keys.any?
redis_usage_data { Gitlab::Redis::HLL.count(keys: keys) }
end
def keys_for_aggregation(events:, start_date:, end_date:, context: '')
end_date = end_date.end_of_week - 1.week
(start_date.to_date..end_date.to_date).map do |date|
events.map { |event| redis_key(event, date, context) }
end.flatten.uniq
end
def load_events(wildcard)
Dir[wildcard].each_with_object([]) do |path, events|
events.push(*load_yaml_from_path(path))
end
end
def load_yaml_from_path(path)
YAML.safe_load(File.read(path))&.map(&:with_indifferent_access)
end
def known_events_names
known_events.map { |event| event[:name] }
end
def event_for(event_name)
known_events.find { |event| event[:name] == event_name.to_s }
end
def events_for(event_names)
known_events.select { |event| event_names.include?(event[:name]) }
end
# Compose the key in order to store events daily or weekly
def redis_key(event, time, context = '')
raise UnknownEvent, "Unknown event #{event[:name]}" unless known_events_names.include?(event[:name].to_s)
key = "{#{REDIS_SLOT}}_#{event[:name]}"
year_week = time.strftime('%G-%V')
key = "#{key}-#{year_week}"
key = "#{context}_#{key}" if context.present?
key
end
end
end
end
end
Gitlab::UsageDataCounters::HLLRedisCounter.prepend_mod_with('Gitlab::UsageDataCounters::HLLRedisCounter')
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